एपीए उद्धरण

Gamma, E., Helm, R., Johnson, R., & Viissides, J. (1995). Design patterns: Elemets of reusable object - oriented software. Boston: Addison - Wesley.

शिकागो स्टाइल उद्धरण

Gamma, Erich, Richard Helm, Ralph Johnson, और John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.

एमएलए उद्धरण

Gamma, Erich, Richard Helm, Ralph Johnson, और John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.